Traceback

General code for performing trajectory traceback from AIU traceback code.

Project 1: SNR G166.0+04.3

Green's catalog: https://www.mrao.cam.ac.uk/surveys/snrs/snrs.data.html

on vizier table "VII/272/snrs": https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VII/272

Summary SNR G166.0+04.3

https://www.mrao.cam.ac.uk/surveys/snrs/snrs.G166.0+4.3.html

Parameter	Value
Right Ascension	05 26 30
Declination	+42 56
Size (arcmin)	55×35
Type	S
Flux Density at 1 GHz (Jy)	7
Spectral Index	0.37
Radio	Two arcs of strikingly different radii
Optical	Nearly complete ring
X-ray	Predominantly in SW
Distance	HI indicates 4.5 kpc, optical extinction suggests 3.2 kpc

Stars in question:

195633320791780608, 195633325090480896

in the input file they are at line nos

3449, 3587 respectively

Stars in the region:

Region is defined as 1 deg around the center at:

81.625 deg, 42.93333333 deg has 130,096 sources

and distance range (with RUWE < 1.4 and PlxQ > 5):

2.5 kpc to 5 kpc has 4,749 sources

Workflow:

Aim: to trace back any 2 Gaia stars.

Step 1: Create the input.tsv file

This file conatins the two stars to be traced back. The Gaia source IDs are required for the two stars. Using the commands:

trace = Traceback(195633320791780608, 195633325090480896)
trace.create_input_file()

Step 2: Create the trace.conf file

This file contains the parameters of the traceback simulation. This requires a sample_config.conf file containing the main fields for the traceback.

Use the class SimulationConfig to create it:

# Usage example
sample_config = 'sample_trace.conf'
config = SimulationConfig(sample_config)

# Change parameters with attributes
config.orbits = 100_000  
config.steps = 1000     
config.stepsize = -100
config.width = 100
config.star1 = '"two_trace/input.tsv#2"'
config.star2 = '"two_trace/input.tsv#3"'
config.outfile = '"two_trace/trace/test"'
# Save the changes
config.save_config('giessler_traceback/two_trace/trace.conf')

Step 3: Run the simulation

Now that the two files: input.tsv and trace.conf are created, we are ready to run the simulation. To run the simulation:

execute_command('cd giessler_traceback ; examples/trace/traceback two_trace/trace.conf')

Project 2: SNR G180.0−1.7

Green's catalog: https://www.mrao.cam.ac.uk/surveys/snrs/snrs.data.html

on vizier table "VII/272/snrs": https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VII/272

Summary SNR 147

B. Dinçel et al. 2015

https://www.mrao.cam.ac.uk/surveys/snrs/snrs.G166.0+4.3.html

Parameter	Value
Right Ascension	05 39 00
Declination	+27 50
Size (arcmin)	180
Type	S
Flux Density at 1 GHz (Jy)	65
Spectral Index	varies
Radio	Large faint shell, with spectral break
Optical	Wispy ring
X-ray	Possible detection
Point sources	Pulsar within boundary, with faint wind nebula
Distance	Various observations suggest about 1.2 kpc

Stars in question:

HD 37424, PSR J0538+2817

3441732292729818752, n/a

Object	Proper Motion in RA (μα)*	Proper Motion in Dec (μδ)
HD 37424 (DR2?)	10.0 ± 0.8	−5.9 ± 0.6
HD 37424 (DR3)	12.228 ± 0.036	-9.407 ± 0.017
Pulsar (old)	−24.4 ± 0.1	57.2 ± 0.1
Pulsar (new)	−24.4 ± 0.1	57.2 ± 0.1